Hydraulic props

Hydraulic props are intended for roof support, roof support brackets pressing against mine roof and exercising force resistance to roof lowering and dropping.

The prop is a hydraulic advancing cylinder with two-way hydraulic extension. The prop consists of a plunger (piston), shaft, check valve and other minor components.

JSC «DAP» provides chromium-plating of internal functional surfaces of the cylinder and plunger increasing their corrosion resistance and, correspondingly, increasing operational life and durability.

Working fluid

Any oil-water sludge permissible to use in coal mining facilities, with purity class grade 15 and higher according to DSTU GOST 17216, and industrial oils with the same purity class.

	1КД80.13. 01.000	1КД80.14. 01.000	1КД80.16. 01.000	1КД99.14. 01.000	1КД90.27. 01.000	2КД90.21. 01.000	2КД90Т.60. 01.000	МК98.31. 01.000
Nominal extension, mm	503	495	495	555	593	734	851	664
Nominal load capacity, kN	700	700	700	820	820	700	1290	820
Head end pressure, MPa	32	32	32	39	39	32	39	39
Plunger end pressure, MPa	67	67	67	82	82	67	69	82
Prop height in non-extension mode, mm	537	545	545	573	594	687	678	625
Weight, kg	102	104	104	97	104	119	182	110
Developer	DONGIPROUGLEMASH (Ukraine)